Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The onset of September results in a small decrease in the average high-temperature, moderately receding from a very hot 95°F (35°C) in August to a hot 86.9°F (30.5°C). Castell records an average nighttime low-temperature of 68.9°F (20.5°C) throughout September.Heat index
The heat index for September is evaluated at a sweltering 95°F (35°C). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.Heat index specifics point out values are for conditions of shade and a slight breeze. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
In the face of high temperatures, the human body's reflex is to perspire, leveraging sweat evaporation for cooling. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. Overheating and potential dehydration arise when body heat gain eclipses its release capability.
Humidity
In Castell, the average relative humidity in September is 65%.Rainfall
In Castell, during September, the rain falls for 13.3 days and regularly aggregates up to 2.36" (60mm) of precipitation. In Castell, during the entire year, the rain falls for 123.8 days and collects up to 21.18" (538mm) of precipitation.Snowfall
In Castell, snow does not fall in March through November.Daylight
In September, the average length of the day in Castell, Texas, is 12h and 20min.On the first day of September, sunrise is at 7:12 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 7:21 pm CDT.
Sunshine
In Castell, the average sunshine in September is 8.5h.UV index
In Castell, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for average individuals.Note: The average daily UV index of 6 in September transforms into the following instructions:
Resist extreme sun exposure. Guarding against solar damage is essential. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September in Castell?
What is the average humidity in September in Castell?
How much does it rain in Castell in September?
When it does not snow in Castell?
What is the average length of the day in September in Castell?
When is the sunrise / sunset in September in Castell?
How many hours of sunshine does Castell have in September?
What is the UV index reading in September in Castell?
Average temperature in September
Castell, TX
- Average high temperature in September: 86.9°F
The warmest month (with the highest average high temperature) is August (95°F).
The month with the lowest average high temperature is January (59.4°F).
- Average low temperature in September: 68.9°F
The month with the highest average low temperature is August (74.3°F).
The coldest month (with the lowest average low temperature) is January (40.8°F).
Average pressure in September
Castell, TX
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Castell, TX
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is September (7mph).
Average humidity in September
Castell, TX
- Average humidity in September: 65%
The month with the highest relative humidity is May (72%).
The month with the lowest relative humidity is August (56%).
Average rainfall in September
Castell, TX
- Average rainfall in September: 2.36"
The wettest month (with the highest rainfall) is May (3.9").
The driest month (with the least rainfall) is November (0.94").
Average rainfall days in September
Castell, TX
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (7.3 days).
Average snowfall in September
Castell, TX
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.28").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Castell, TX
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.8 days).
The months with the least snowfall days are March, April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Castell, TX
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are November and December (Average sunshine: 5h and 42min).
Average sunshine days in September
Castell, TX
- Average sunshine days in September: 15.1 days
The month with the most sunshine days is January (22.2 days).
The month with the least sunshine days is May (13.2 days).
Average UV index in September
Castell, TX
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Castell, TX
- Average cloud cover in September: 31
The month with the most cloud cover is May (Cloud cover 41).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in September
Castell, TX
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Castell, Texas, USA
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